ẢNH HƯỞNG CỦA LIỀU LƯỢNG PHÂN BÓN ĐẾN NĂNG SUẤT CỦA GIỐNG NGÔ LAI LVN68

The experiments were carried in Summer-Autumn, Autumn-Winter and Winter-Spring cropping seasons in Trang Bom district- Dong Nai provice, Duc Trong distric, Lam Dong province and Tan Chau district, An Giang province from 2010 to 2012. The experiment includes 7 fertilizer dosages (kg/ha) 120N-80P2O5-80K2O; 120N-80P2O5- 100K2O; 150N-80P2O5-80K2O; 150N-80P2O5- 100K2O; 180N-80P2O5-80K2O; 180N-80P2O5- 100K2O and 150N-80P2O5-60K2O (check). The results showed that at the fertilizer dosage of 180N-80P2O5- 80K2O in Trang Bom - Dong Nai, DucTrong - Lam Dong and 180N-80P2O5-100K2O in Tan Chau - An Giang, LVN68 gave highest yield and higher than that of the check from 121.21 to 125.45 %. From the result, fertilizer dosage of 180N-80P2O5-80K2O (kg/ha) is the most suitable dosage for LVN68 in Trang Bom district, Dong Nai province, Duc Trong distric Lam Dong province and 180N80P2O5-100K2O (kg/ha) in Tan Chau district, An Giang province.